Motocross Bikes

2012Suzuki RM-Z450

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The 2012 Suzuki RM-Z450 is a competitive motocross machine designed for intermediate to advanced riders seeking a lightweight, agile platform. Powered by a 449cc liquid-cooled four-stroke engine with fuel injection, it delivers responsive power delivery ideal for both track racing and recreational off-road riding. Known for excellent handling and reliability, the RM-Z450 remains a proven choice in the 450cc motocross class.

Capacity: 449.0 ccm
Engine: Single, four-stroke
Gearbox: 5-speed
Dry weight: 101.5 kg
Seat height: 955 mm
Power: 56.0 HP (41.2 kW)

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Other years 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail96%

Cornering88%

City riding5%

Daily riding10%

Touring5%

Two-up0%

Track85%

Best for: Built purely for motocross track and off-road competition, not for street or commuting use.
Built for: A raw, high-revving, single-cylinder motocross machine that rewards aggressive riding with sharp handling and explosive acceleration out of corners.
Not ideal for: Not suitable for beginners, passengers, daily road commuting, or anyone seeking comfort or long-distance touring capability.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 955mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2012 Suzuki RM-Z450, with a cramped knee angle of around 85 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

Find bikes that fit your height →

Full specifications

Engine

Capacity: 449.0 ccm
Power: 56.0 HP (41.2 kW)
Engine type: Single, four-stroke
Power/weight ratio: 0.5517 HP/kg (dry)
Bore x stroke: 96.0 x 62.1 mm
Compression: 12.5:1
Cooling system: Liquid
Fuel system: Injection
Starting: Kick
Ignition: Electronic
Valves per cylinder: 4
Lubrication system: Suzuki Advanced Sump System (SASS)

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet, multi-plate rack-and-pinion clutch

Dimensions & weight

Wheelbase: 1495 mm
Overall length: 2190 mm
Overall width: 830 mm
Overall height: 1270 mm
Seat height: 955 mm
Dry weight: 101.5 kg
Wet weight: 113.0 kg
Fuel capacity: 6.20 litres
Ground clearance: 325 mm

Chassis & suspension

Frame: Twin-spar aluminum frame and swingarm.
Front suspension: Telescopic inverted, coil spring, oil damped
Rear suspension: Swingarm, link type, coil spring, oil damped
Front wheel travel: 310 mm
Rear wheel travel: 310 mm
Rake (fork angle): 29.8°
Trail: 130 mm

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 270 mm
Rear brakes: Single disc
Front tyre: 80/100-21
Rear tyre: 110/90-19

Other

Color options: Yellow/black/red
Modifications compared to previous model: New 12-hole fuel injector increases fuel atomization for better power delivery.

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	2005	2011	2012	2016	2022	2027
Capacity	449 cc	449 cc	449 cc	449 cc	449 cc	449 cc
Dry weight	101 kg	102 kg	102 kg	102 kg	102 kg	102 kg
Seat height	995 mm	955 mm	955 mm	955 mm	960 mm	960 mm
Fuel capacity	7 L	6.2 L	6.2 L	6.2 L	6.3 L	6.3 L